"Fitbit is committed to delivering the best possible experience for our users. We are aware of the reported issue and an update to our Android app will be rolled out to users tomorrow, July 11th. We believe this will address any remaining concerns related to this issue."

The problem was first reported by Fitbit users on Twitter, and over on the San Francisco company’s forums last week and, although a bug fix has already been rolled out, people are still complaining that the issue is affecting them. There are reports that as much as 3.5GB of unexplained mobile data has been swallowed up in the first few days of July – along with a significant extra battery use.

Fitbit first acknowledged the problem last week when it stated on Twitter:

“We're working to resolve an issue which is causing the Fitbit app for Android to consume a larger amount of mobile data, and/or increased battery drain on mobile devices. Uninstalling/re-installing the Fitbit app may help resolve related loading and crashing issues.”

The issue is obviously a big deal for people on a limited data plan – where using extra data beyond their allowance costs extra.

Fitbit is the second biggest player in the fitness tracker market – behind only China’s Xiaomi – and is easily the most popular brand in the western world. It holds a 28.1 percent share of the wearables market (according to IDC) and has over 25 million active users.

It has five different fitness trackers currently on sale, alongside two smartwatches and other accessories such as smart scales and headphones. It was founded back in 2007 and went public in 2015 when stock began trading on the NYSE.

Paul Lamkin is the editor-in-chief of Wareable - the authority on wearable technology and the co-founder of The Ambient - a new smart home focused site.